HTTP Response Status Codes as constants

HTTPCodes.php

<?php

    /**
     * @author Khalid Chatar
     *
     * Contains http response status codes
     */
    class HTTPCodes {
        const INFO_CONTINUE           = 100;
        const INFO_SWITCHING_PROTOCOL = 101;

        const SUCCESS_OK                     = 200;
        const SUCCESS_CREATED                = 201;
        const SUCCESS_ACCEPTED               = 202;
        const SUCCESS_NON_AUTHORITATIVE_INFO = 203;
        const SUCCESS_NO_CONTENT             = 204;
        const SUCCESS_RESET_CONTENT          = 205;
        const SUCCESS_PARTIAL_CONTENT        = 206;

        const REDIRECT_MULT_CHOICE        = 300;
        const REDIRECT_MOVED              = 301;
        const REDIRECT_FOUND              = 302;
        const REDIRECT_SEE_OTHER          = 303;
        const REDIRECT_NOT_MODIFIED       = 304;
        const REDIRECT_USE_PROXY          = 305;
        const REDIRECT_UNUSED             = 306;
        const REDIRECT_REDIRECT_PERMANENT = 307;
        const REDIRECT_REDIRECT_TEMP      = 308;

        const ERROR_BAD_REQUEST                   = 400;
        const ERROR_UNAUTHORIZED                  = 401;
        const ERROR_PAYMENT_REQUIRED              = 402;
        const ERROR_FORBIDDEN                     = 403;
        const ERROR_NOT_FOUND                     = 404;
        const ERROR_METHOD_NOT_ALLOWED            = 405;
        const ERROR_NOT_ACCEPTABLE                = 406;
        const ERROR_AUTHENTICATE_WITH_PROXY       = 407;
        const ERROR_REQUEST_TIMEOUT               = 408;
        const ERROR_CONFLICT                      = 409;
        const ERROR_REQUESTED_CONTENT_GONE        = 410;
        const ERROR_CONTENT_LENGTH_REQUIRED       = 411;
        const ERROR_PRECONDITION_FAILED           = 412;
        const ERROR_PAYLOAD_TOO_LARGE             = 413;
        const ERROR_URI_TOO_LONG                  = 414;
        const ERROR_UNSUPPORTED_MEDIA_TYPE        = 415;
        const ERROR_REQUESTED_RANGE               = 416;
        const ERROR_EXPECTATION_FAILED            = 417;
        const ERROR_MISDIRECTED_REQUEST           = 421;
        const ERROR_UPGRADE_REQUIRED              = 426;
        const ERROR_PRECONDITION_REQUIRED         = 428;
        const ERROR_TOO_MANY_REQUESTS             = 429;
        const ERROR_REQUEST_HEADERS_TOO_LONG      = 431;
        const ERROR_UNAVAILABLE_FOR_LEGAL_REASONS = 451;

        const SERVER_INTERNAL_ERROR                  = 500;
        const SERVER_NOT_IMPLEMENTED                 = 501;
        const SERVER_BAD_GATEWAY                     = 502;
        const SERVER_SERVICE_UNAVAILABLE             = 503;
        const SERVER_GATEWAY_TIMEOUT                 = 504;
        const SERVER_HTTP_VERSION_NOT_SUPPORTED      = 505;
        const SERVER_VARIANT_ALSO_NEGOTIATES_1       = 506;
        const SERVER_VARIANT_ALSO_NEGOTIATES_2       = 507;
        const SERVER_NETWORK_AUTHENTICATION_REQUIRED = 511;
    }